CN114104337A - Double-layer deployable unit - Google Patents
Double-layer deployable unit Download PDFInfo
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- CN114104337A CN114104337A CN202111543483.6A CN202111543483A CN114104337A CN 114104337 A CN114104337 A CN 114104337A CN 202111543483 A CN202111543483 A CN 202111543483A CN 114104337 A CN114104337 A CN 114104337A
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- 238000004804 winding Methods 0.000 abstract description 2
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- 230000007246 mechanism Effects 0.000 description 19
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/222—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles for deploying structures between a stowed and deployed state
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to a double-layer deployable unit in the technical field of aviation, which comprises an upper platform frame, a lower platform frame, a middle platform and a zipper assembly, wherein the upper platform frame is connected with the middle platform; the upper platform frame and the lower platform frame are respectively hinged with the middle platform through connecting rods, the upper platform frame and the lower platform frame are positioned on two opposite sides of the middle platform, and zipper assemblies are respectively arranged on the upper platform frame and the lower platform frame; the middle platform is for moving the platform, and drive middle platform is spiral rotation, and the rotation that the both ends that upper mounting frame and lower platform frame pass through the connecting rod around the pin joint realizes folding or expandes, and when upper mounting frame and lower platform frame expand, the zip subassembly is used for locking connecting rod and middle platform's connection. The expandable unit of the invention adopts a double-layer structure, the rigidity of the expandable unit and the extending arm is further enhanced on the basis of ensuring the folding and unfolding rate, the unfolding precision is improved, the problem of guy cable winding possibly existing in the unfolding process is solved, and the invention can be used for spacecrafts such as space telescopes, solar sailboards and the like.
Description
Technical Field
The invention relates to the technical field of aviation, in particular to a double-layer deployable unit, and particularly relates to a double-layer deployable unit with a self-contained inhaul cable.
Background
With the development of advanced space technology such as space station, deep space exploration and earth observation, the spacecraft is becoming more miniaturized, complicated and highly precise. The space deployable mechanism solves the problem that the size limit of the carrier rocket and the spacecraft restricts the development of space fittings and technology. The space extending arm is a one-dimensional space extending mechanism and is used for extending and supporting the space equipment such as a solar sailboard, a space telescope, a towing sail and the like. Compared with a coiled type, thin-wall tubular type and inflatable space stretching arm, the hinged truss type space stretching arm has the advantages of high rigidity, high precision and the like. The expandable unit is used as a basic unit module of the hinged truss type space extending arm, and determines the expansion mode, the folding-unfolding ratio, the rigidity, the fundamental frequency and other properties of the extending arm.
The existing deployable units are designed based on an overconstrained mechanism such as a SARRUS mechanism, a plane shearing fork mechanism and the like and a plane mechanism. For example, patent document CN10292316A discloses a triangular prism foldable unit and a foldable support arm composed of the unit based on the SARRUS mechanism, and connects the upper and lower platforms through a folding rod. For example, patent documents CN102765492A and CN105799950B disclose planar scissors mechanisms disposed on the side of a quadrangular prism to form a deployable unit, and the deployable unit is connected in sequence to form a scissor-type space extending arm. For another example, patent document US005267424 is a quadrangular frame formed by connecting links through a ball pair, and a cable is used to increase the rigidity of the unfolded unit, so as to form a cable-rod articulated space extending arm based on the ball pair, the links and the cable.
Patent document CN1474069A cancels a pull cable on the side of the triangular prism expandable unit, adds a side link, connects a folding rod through a revolute pair, and connects a horizontal frame through a revolute pair, thereby forming a crank link mechanism. Patent document CN108401542B discloses an elbow shaped longitudinal beam as a folding rod, and the unfolding of the deployable unit is realized by the elastic potential energy of an elbow shaped joint torsion spring. But the deployable units designed by the existing patents are all of single-layer structures, and the rigidity of the locked units is improved through a flexible inhaul cable, a rigid connecting rod, a joint locking mechanism and the like. Based on the design principle of a hybrid mechanism, the expandable unit with a double-layer structure is designed, a middle platform can be added into the unit, the rigidity of the expanded expandable unit is realized through the comprehensive action of the inhaul cable and the middle platform, and the expandable unit is combined to form a space extending arm with higher performance.
In conclusion, the development of the aerospace technology puts higher requirements on a space expandable mechanism, and a novel expandable unit meeting the requirements on folding and expanding rate, rigidity and precision needs to be designed based on new design principles such as a hybrid mechanism and the like and by comprehensively utilizing the internal space of the unit.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a double-layer deployable unit with a self-contained inhaul cable.
The invention provides a double-layer deployable unit, which comprises an upper platform frame, a lower platform frame, a middle platform and a zipper assembly, wherein the upper platform frame is connected with the lower platform frame;
the upper platform frame and the lower platform frame are respectively hinged with the middle platform through connecting rods, the upper platform frame and the lower platform frame are positioned on two opposite sides of the middle platform, and the zipper assemblies are arranged on the upper platform frame and the lower platform frame;
the middle platform is a movable platform, drives the middle platform to spirally rotate, the upper platform frame and the lower platform frame are folded or unfolded through rotation of two ends of the connecting rod around a hinge point, and when the upper platform frame and the lower platform frame are unfolded, the zipper assembly is used for locking the connecting rod and the middle platform.
In some embodiments, the intermediate platform comprises a rotating connecting rod and a supporting platform, the supporting platform radiates outwards from the center to form a plurality of supporting legs, one end of the rotating connecting rod is rotatably connected with the supporting legs, and the other end of the rotating connecting rod is rotatably connected between the upper connecting rod and the lower connecting rod;
the rotating connecting rods rotate around connecting points of the rotating connecting rods and the supporting legs to enable the middle platform to rotate in a spiral mode, the end points of the rotating connecting rods located between the upper connecting rods and the lower connecting rods are gradually close to the center of the supporting platform to form a folding process, and the end points of the rotating connecting rods located between the upper connecting rods and the lower connecting rods are gradually far away from the center of the supporting platform to form an unfolding process.
In some embodiments, the middle platform further comprises a spring and a locking shaft pin, a shaft hole is formed at one end of the rotating connecting rod connected with the supporting leg, and a guide groove is formed at the end part of the supporting leg;
the spring and the locking pin shaft are sequentially arranged in the shaft hole, one end of the locking pin shaft is in contact with the end face of the spring, the other end of the locking pin shaft is in sliding contact with the end part of the supporting leg through the elastic force of the spring, and when the rotating connecting rod rotates to be completely unfolded, the end part of the locking pin shaft enters and is locked in the pin hole of the guide groove.
In some embodiments, the connecting rod is rotatably connected with the rotating connecting rod through an H hinge, the H hinge comprises an upper support and a lower support, the upper support and the lower support are provided with a connecting column and a connecting hole which are matched, and the end of the rotating connecting rod is rotatably connected to the connecting column between the upper support and the lower support;
the upper support and the lower support are both provided with accommodating grooves which are rotatably connected with the end parts of the connecting rods.
In some embodiments, the upper platform frame and the lower platform frame are both frame structures formed by connecting rod bodies, and the rod bodies are provided with grooves along the axial direction.
In some embodiments, the zipper assembly includes an elastic traction module, fixed blocks, a guide shaft, two sliding shaft blocks and a pull cable, the two fixed blocks are fixed at two ends of a groove of the rod body, two ends of the guide shaft are respectively connected with the two fixed blocks, the two sliding shaft blocks are slidably connected to the guide shaft and located between the two fixed blocks, the elastic traction module is used for enabling the two sliding shaft blocks to move in opposite directions, the middle part of the pull cable is sleeved on the two sliding shaft blocks, and two ends of the pull cable respectively penetrate through the fixed blocks at two sides and then are respectively connected to the two groups of H hinges in a crossed manner;
when the double-layer extensible unit is folded, the elastic traction module drives the two sliding shaft blocks to move back and forth, and the redundant part of the inhaul cable is accommodated in the groove of the rod body; when the double-layer deployable unit is deployed, the guy cable pulls the two sliding shaft blocks to move oppositely under the action of external force, the elastic traction module gives the two sliding shaft blocks with opposite acting force to enable the guy cable to be in a tensioning state, and the connection between the connecting rod and the middle platform is locked.
In some embodiments, the elastic traction module is a long compression spring, the long compression spring is sleeved on the guide shaft, and two ends of the long compression spring are respectively connected with the two sliding shaft blocks;
when the double-layer deployable unit is folded, the two sliding shaft blocks are away from each other under the action of the elasticity of the long pressure spring, and the redundant part of the inhaul cable is accommodated in the groove of the rod body; when the double-layer deployable unit is deployed, the long pressure spring is compressed and provides opposite acting forces to the two sliding shaft blocks, so that the inhaul cable is in a tensioning state, and the connection between the connecting rod and the middle platform is locked.
In some embodiments, the elastic traction module includes a short compression spring, a traction slider, and a first traction wire, the traction slider is slidably connected to the guide shaft and located between the fixed block and the sliding shaft block, a middle portion of the first traction wire is sleeved on the traction slider and the fixed block, and two ends of the first traction wire are respectively connected to the fixed block and the sliding shaft block;
when the double-layer deployable unit is folded, the two traction sliding blocks are close to each other under the pushing of the short pressure spring, so that the two sliding shaft blocks are far away from each other under the pulling of the first traction wire, and redundant parts of the inhaul cable are accommodated in the groove of the rod body; when the double-layer deployable unit is deployed, the short pressure spring is compressed and provides reacting force for the two sliding shaft blocks through the traction sliding block and the first traction wire, so that the inhaul cable is in a tensioning state, and the connection between the connecting rod and the middle platform is locked.
In some embodiments, the elastic traction module includes a spiral spring, wheel shafts, a wheel hub and a second traction wire, two sets of the wheel shafts are fixed at two ends of the groove of the rod body and are respectively located at the outer sides of the fixed blocks, the wheel hub is rotatably connected to the wheel shafts and rotates through the spiral spring, one end of the second traction wire is wound on the wheel hub, and the other end of the second traction wire penetrates through the fixed blocks and is connected with the sliding shaft block;
when the double-layer deployable unit is folded, the scroll spring enables the hub to rotate, so that the two sliding shaft blocks are far away from each other through the second traction wire, and redundant parts of the inhaul cable are accommodated in the groove of the rod body; when the double-layer expandable unit is expanded, the two sliding shaft blocks are close to each other under the action of the inhaul cable, at the moment, the second traction line pulls the hub to rotate reversely, the inhaul cable is in a tensioning state through the elasticity of the volute spiral spring, and the connection between the connecting rod and the middle platform is locked.
In some embodiments, the cable guiding device further comprises a retaining block, the retaining block is mounted in the middle of the guiding shaft, grooves for the cable to pass through are formed in two sides of the retaining block, and the retaining block is used for preventing the guiding shaft from deforming.
Compared with the prior art, the invention has the following beneficial effects:
1. the two parallel mechanisms are arranged in a mirror image mode and share the movable platform to form the double-layer hybrid mechanism as the expandable unit, wherein the shared movable platform is a middle platform of the expandable unit, the expandable unit is changed into a double-layer structure from a common single-layer structure, the internal space of the expandable unit is filled, the hollow structure of the existing expandable unit and the hollow structure of the extending arm are avoided, and the rigidity of the unit is integrally increased.
2. After the expandable unit is completely expanded, the connection between the rotating connecting rod and the middle platform is locked at the H-shaped hinge through the tension of six inhaul cables, the unit structure is strengthened by adopting a method of matching the inhaul cables with the middle platform, and the expandable unit is more reliable compared with the mode of simply locking by using a shaft pin or a lock catch.
3. According to the invention, the inhaul cable self-storage device is designed in the grooves of the frames of the upper platform and the lower platform, the problem of inhaul cable winding which possibly occurs in the unfolding process of the extensible unit is solved on the premise of not influencing the folding and unfolding rate, and the whole rigidity of the unit is adjusted by customizing the rigidity of the elastic element in the inhaul cable self-storage device and the rigidity of the spring in the middle platform.
4. The end pin hole of the support platform is provided with a guide groove, so that the locking of the middle platform can be assisted when the unit is about to be unfolded.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of the overall structure of the deployable unit fully deployed;
FIG. 2 is a schematic view of a half-deployed configuration of the deployable unit without the cable;
FIG. 3 is a schematic view of the overall structure of the foldable unit in a folded state;
FIG. 4 is a schematic structural view of an upper platen frame;
FIG. 5 is a schematic structural view of an H hinge;
FIG. 6 is a schematic structural view of an intermediate platform;
FIG. 7 is a partial cross-sectional view of the intermediate platform;
FIG. 8 is an enlarged partial perspective view of the junction of the legs of the intermediate platform and the pivot link;
FIG. 9 is a schematic view of a cable assembly with the resilient member being a long compression spring;
FIG. 10 is a schematic view of the internal perspective of the cable assembly of FIG. 9;
FIG. 11 is a schematic view of a cable assembly with the resilient element being a short compression spring;
FIG. 12 is an enlarged view of a portion of FIG. 12;
FIG. 13 is a schematic view of a partial perspective structure of the elastic element when it is a short compression spring;
FIG. 14 is a schematic view of the cable assembly with the elastic element being a wrap spring;
fig. 15 is a partially enlarged view of fig. 14.
The figures show that:
The upper support seat 51 of the inhaul cable assembly 6 pulls the sliding block 612
First pull wire 613 of lower support 52 of rod 10
Connecting rod bearing 11 cable connecting element 53 volute spring 614
Support table 32 fixed block 62 hub 616
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
As shown in fig. 1 to 15, the present invention provides a double-deck deployable unit including an upper platform frame 1, a lower platform frame 2, an intermediate platform 3, a link 4, an H-hinge 5, and a cable assembly 6. The upper platform frame 1 and the middle platform 3 form an upper layer parallel mechanism with the configuration of 3-RUR through a connecting rod 4 and an H hinge 5, the lower platform frame 1 and the middle platform 3 form a lower layer parallel mechanism with the configuration of 3-RUR through a connecting rod 4 and an H hinge 5, and the middle platform 3 moves in a vertical spiral mode. Preferably, the upper platform frame 1 and the lower platform frame 2 have the same structure, the upper layer parallel mechanism and the lower layer parallel mechanism share the middle platform 3, are arranged in a mirror image mode relative to the middle platform 3, and form a double-layer expandable unit together with the inhaul cable assembly 6. Because the upper platform frame 1 and the lower platform frame 2 are arranged in a mirror image mode, in the unfolding process of the double-layer deployable unit, the upper platform frame 1 is parallel to the lower platform frame 2 and translates upwards, and the middle platform 3 makes vertical spiral motion.
As shown in fig. 4, the upper platform frame 1 and the lower platform frame 2 have the same structure, and are both regular triangle frame structures, the frames are both formed by rod bodies 10 provided with grooves, and the end parts of the rod bodies 10 are symmetrically provided with connecting rod supports 11 on the upper and lower surfaces. The support axis direction of the connecting rod support 11 is perpendicular to the frame direction, and the connecting rod 4 is connected with the upper platform frame 1 and the lower platform frame 2 through the connecting rod support 11 in a rotating pair mode. All the rod bodies 10 of the upper platform frame 1 and the lower platform frame 2 are internally provided with grooves, and the inhaul cable assembly 6 is arranged in the grooves.
As shown in fig. 5, the H-hinge 5 includes an upper support 51 and a lower support 52, the support axes of the upper support 51 and the lower support 52 are parallel, a connecting body is arranged between the upper support 51 and the lower support 52, the connecting body is preferably a cylinder, and the upper support 51 and the lower support 52 are connected through the cylinder and a screw. The cylinder may be included on the upper holder 51 or the lower holder 52, or may be a separate element, and the example merely shows the cylinder included on the lower holder 52, and accordingly, the upper holder 51 is provided with a coupling hole adapted to the cylinder. The upper support 51 and the lower support 52 are connected with the connecting rod 4 through a revolute pair, and the cylinder is connected with the rotary connecting rod 31 of the middle platform 3 through a revolute pair. The upper support 51 and the lower support 52 are provided with a cable connecting element 53, and the cable connecting element 53 can be a fisheye screw, an eye screw, a perforated screw or other elements capable of realizing the cable connecting function.
As shown in fig. 6-8, the intermediate platform 3 includes a pivot link 31 and a support platform 32, and preferably, a spring 33 and a locking pin 34. One end of the rotating connecting rod 31 is connected with the H hinge 5 through a rotating pair, and the other end is connected with the supporting platform 32 through a rotating pair, specifically, the supporting platform 32 is formed into a plurality of supporting legs 321 by radiating outwards from the center, and the other end of the rotating connecting rod 31 is rotatably connected with the supporting legs 321. The rotation link 31 has a shaft hole 35 formed at an end connected to the leg 321, and a spring 33 and a locking shaft pin 34 are sequentially installed in the shaft hole 35. A guide slot 36 is formed in the end of leg 321 and the guide slot 36 terminates in a locking pin hole 37, the pin hole 37 mating with the locking pin 34. During the unfolding process of the double-layer unfoldable unit, the locking shaft pin 34 moves along the arc-shaped surface of the end part of the supporting leg 321 under the elastic force of the spring 33, when the double-layer unfoldable unit is completely unfolded, the guide groove 36 guides the locking shaft pin 34 to enter the pin hole 37, and the locking shaft pin 34 is completely matched with the pin hole 37, so that the double-layer unfoldable unit is locked.
As shown in fig. 9-10, the grooves of the upper platform frame 1 and the lower platform frame 2 are provided with the cable assembly 6, the cable assembly 6 includes a fixed block 62, a guide shaft 63, a sliding shaft block 64, a cable 65 and an elastic traction module 61, in this embodiment, the elastic traction module 61 is a single assembly long compression spring 610. The guide shaft 63 is installed in the groove of the rod body 10 through the fixing block 62, and the two sliding shaft blocks 64 are slidably connected to the guide shaft 63 to slide. The long pressure spring 610 penetrates the guide shaft 63, and both ends are respectively connected with the two sliding shaft blocks 64. In order to keep the guide shaft 63 from deforming during operation, it is preferable that a holding block 66 is installed in the middle of the guide shaft 63, and both sides of the holding block 66 are grooved, so as not to affect the storage of the cable 65. The pulling cable 65 can be a steel wire rope or a nylon rope, the middle part of the pulling cable 65 is sleeved on the two sliding shaft blocks 64, the fixing block 62 is provided with a cable through hole, and the two ends of the pulling cable 65 penetrate through the cable through hole and are fixed on the H hinge 5 in a crossed mode through the pulling cable connecting element 53. When the double-layer deployable unit is folded, the sliding shaft blocks 64 on the two sides are away from each other under the elastic action of the long pressure spring 610, and the redundant part of the inhaul cable 65 is sleeved on the two sliding shaft blocks 64 and is accommodated in the groove of the rod body 10; when the double-layer deployable unit is deployed, the inhaul cables 65 are tensioned to push the two sliding shaft blocks 64 to compress the long pressure springs 610, after the double-layer deployable unit is completely deployed, the inhaul cables 65 are in a shape like a Chinese character're' and are arranged on the side faces of the deployable unit in pairs up and down, the six inhaul cables 65 mounted on the H hinge 5 provide closing tension along the direction of the rotating connecting rod 31 for the middle platform 3, and the rigidity of the middle platform 3 and the deployable unit after the double-layer deployable unit is completely locked is realized.
Example 2
In this embodiment 2, a modification of the embodiment 1 is provided, and an elastic traction module formed by a single long compression spring is modified into a multi-component elastic traction module mainly including a short compression spring, so that the application can be adapted to different application scenarios.
As shown in fig. 11 to 13, when the elastic member is a short compression spring 611, the elastic traction module 61 includes the short compression spring 611, a traction slider 612, and a first traction wire 613. The traction sliding block 612 is slidably connected to the guide shaft 63 and located between the fixed block 62 and the sliding shaft block 64, the short compression spring 611 penetrates through the guide shaft 63 and is located between the fixed block 62 and the traction sliding block 612, the middle of the first traction wire 613 is sleeved on the traction sliding block 612 and the fixed block 62, one end of the first traction wire 613 is fixed to the fixed block 62, and the other end of the first traction wire 613 is fixed to the sliding shaft block 64. The elastic traction modules 61 are arranged at two ends of the groove of the rod body 10.
When the double-layer deployable unit is in a folded state, the short pressure spring 611 pushes the traction slider 612 to move, and then the first traction wire 613 pulls the sliding shaft block 64 to move towards the fixed block 62, so that the cable is stored by increasing the distance between the two sliding shaft blocks 64; when the double-layer deployable unit is deployed, the two sliding shaft blocks 64 are tensioned by the cable 65 to approach each other, and then the traction sliding block 612 moves towards the fixed block 62 through the first traction line 613 to compress the short compression spring 611, so that the tensioning of the cable 65 is realized through the elastic force of the short compression spring 611.
Example 3
In this embodiment 3, a modification of the embodiment 1 is provided, and an elastic traction module formed of a single long compression spring is modified into an elastic traction module of a plurality of components including a spiral spring, so that the application can be adapted to different application scenarios.
As shown in fig. 14-15, when the elastic element is a spiral spring 614, the elastic traction module 61 includes a spiral spring 614, an axle 615, a hub 616 and a second traction wire 617. The wheel shaft 615 is fixed in the groove of the rod body 10 and located outside the fixed block 62, the hub 616 is rotatably connected to the wheel shaft 615, the spiral spring 614 is connected to the wheel shaft 615 and the hub 616, the hub 616 is rotated by the spiral spring 614, one end of the second traction wire 617 is wound on the hub 616, and the other end of the second traction wire 617 passes through the fixed block 62 and is fixed on the sliding shaft block 64. The elastic traction modules 61 are arranged at two ends of the groove of the rod body 10.
When the double-layer expandable unit is in a folded state, the hub 616 rotates through the elastic force of the spiral spring 614, and the two sliding shaft blocks 64 are pulled to be away from each other through the second traction wire 617, so that the inhaul cable accommodating function is realized; when the expandable unit is expanded, the cable 65 tensions the two sliding shaft blocks 64 to approach each other, and the scroll spring 614 is charged by the second traction wire 617, so as to tension the cable 65.
Claims (10)
1. A double-layer deployable unit is characterized by comprising an upper platform frame (1), a lower platform frame (2), a middle platform (3) and a zipper assembly (6);
the upper platform frame (1) and the lower platform frame (2) are hinged with the middle platform (3) through connecting rods (4) respectively, the upper platform frame (1) and the lower platform frame (2) are located on two opposite sides of the middle platform (3), and the zipper assemblies (6) are mounted on the upper platform frame (1) and the lower platform frame (2);
middle platform (3) are for moving the platform, drive middle platform (3) are spiral rotation, upper mounting frame (1) with lower mounting frame (2) pass through the rotation of pin joint is wound at the both ends of connecting rod (4) is realized folding or is expanded, upper mounting frame (1) with when lower mounting frame (2) expand, zip subassembly (6) are used for the locking connecting rod (4) with the connection of middle platform (3).
2. The double-deck deployable unit according to claim 1, wherein the intermediate platform (3) comprises a rotating link (31) and a support platform (32), the support platform (32) is formed with a plurality of legs (321) radiating outwards from the center, one end of the rotating link (31) is rotatably connected with the legs (321), and the other end is rotatably connected between the upper link and the lower link (4);
the rotary connecting rod (31) rotates around a connecting point with the supporting leg (321) to enable the middle platform (3) to rotate in a spiral mode, the rotary connecting rod (31) is located at the upper portion and the lower portion, end points between the connecting rods (4) gradually approach towards the center of the supporting table (32) to form a folding process, the rotary connecting rod (31) is located at the upper portion and the lower portion, the end points between the connecting rods (4) gradually keep away from the center of the supporting table (32) to form an unfolding process.
3. The double-deck deployable unit according to claim 2, wherein the intermediate platform (3) further comprises a spring (33) and a locking pin (34), one end of the rotating link (31) connected to the leg (321) is provided with a shaft hole (35), and the end of the leg (321) is provided with a guide groove (36);
the spring (33) and the locking pin shaft (34) are sequentially arranged in the shaft hole (35), one end of the locking pin shaft (34) is in contact with the end face of the spring (33), the other end of the locking pin shaft is in sliding contact with the end part of the supporting leg (321) under the action of the elastic force of the spring (33), and when the rotating connecting rod (31) rotates to be completely unfolded, the end part of the locking pin shaft (34) enters and is locked in the pin hole (37) of the guide groove (36).
4. The double-deck deployable unit according to claim 1, wherein the link (4) is rotatably connected with the rotating link (31) through an H-hinge (5), the H-hinge (5) comprises an upper support (51) and a lower support (52), the upper support (51) and the lower support (52) are provided with a connecting column and a connecting hole which are matched, and the end of the rotating link (31) is rotatably connected with the connecting column between the upper support (51) and the lower support (52);
the upper support (51) and the lower support (52) are both provided with accommodating grooves which are rotatably connected with the end parts of the connecting rods (4).
5. Double-deck deployable unit according to any of claims 1 to 4, wherein the upper platform frame (1) and the lower platform frame (2) are each a frame structure formed by a rod (10) connected, the rod (10) being provided with a groove in axial direction.
6. The double-deck deployable unit according to claim 5, wherein the zipper assembly (6) comprises an elastic traction module (61), fixing blocks (62), a guide shaft (63), a sliding shaft block (64) and a pull cable (65), the two fixing blocks (62) are fixed at two ends of a groove of the rod body (10), two ends of the guide shaft (63) are respectively connected with the two fixed blocks (62), the two sliding shaft blocks (64) are connected on the guide shaft (63) in a sliding way and are positioned between the two fixed blocks (62), the elastic traction module (61) is used for enabling the two sliding shaft blocks (64) to generate opposite movement, the middle part of the inhaul cable (65) is sleeved on the two sliding shaft blocks (64), two ends of the inhaul cable (65) respectively penetrate through the fixing blocks (62) on the two sides and then are respectively connected to the two groups of H hinges (5) in a crossed mode;
when the double-layer expandable unit is folded, the elastic traction module (61) drives the two sliding shaft blocks (64) to move back and forth, and the redundant part of the inhaul cable (65) is accommodated in the groove of the rod body (10); when the double-layer deployable unit is unfolded, the pull cable (65) pulls the two sliding shaft blocks (64) to move oppositely under the action of external force, the elastic traction module (61) gives the two sliding shaft blocks (64) with opposite acting force to enable the pull cable (65) to be in a tensioning state, and the connection of the connecting rod (4) and the middle platform (3) is locked.
7. The double-layer deployable unit according to claim 6, wherein the elastic traction module (61) is a long compression spring (610), the long compression spring (610) is sleeved on the guide shaft (63) and two ends of the long compression spring are respectively connected with the two sliding shaft blocks (64);
when the double-layer deployable unit is folded, the two sliding shaft blocks (64) are mutually far away under the action of the elasticity of the long pressure spring (610), and the redundant part of the inhaul cable (65) is accommodated in the groove of the rod body (10); when the double-layer deployable unit is deployed, the long pressure spring (610) is compressed and gives opposite acting forces to the two sliding shaft blocks (64), so that the inhaul cable (65) is in a tensioned state, and the connection between the connecting rod (4) and the middle platform (3) is locked.
8. The double-layer deployable unit according to claim 6, wherein the elastic traction module (61) comprises a short compression spring (611), a traction slider (612) and a first traction wire (613), the traction slider (612) is slidably connected to the guide shaft (63) and located between the fixed block (62) and the sliding shaft block (64), the middle of the first traction wire (613) is sleeved on the traction slider (612) and the fixed block (62), and two ends of the first traction wire (613) are respectively connected with the fixed block (62) and the sliding shaft block (64);
when the double-layer deployable unit is folded, the two traction sliding blocks (612) are pushed by the short compression spring (611) to approach each other, so that the two sliding shaft blocks (64) are pulled by the first traction wire (613) to be away from each other, and the redundant part of the inhaul cable (65) is accommodated in the groove of the rod body (10); when the double-layer expandable unit is expanded, the short compression spring (611) is compressed and gives reaction force to the two sliding shaft blocks (64) through the traction sliding block (612) and the first traction line (613), so that the inhaul cable (65) is in a tension state, and the connection between the connecting rod (4) and the middle platform (3) is locked.
9. The double-deck deployable unit according to claim 6, wherein the elastic traction module (61) comprises a scroll spring (614), a wheel shaft (615), a wheel hub (616) and a second traction wire (617), two sets of wheel shafts (615) are fixed at two ends of the groove of the rod body (10) and are respectively located at the outer sides of the fixed block (62), the wheel hub (616) is rotatably connected to the wheel shaft (615) and is rotated by the scroll spring (614), one end of the second traction wire (617) is wound on the wheel hub (617), and the other end of the second traction wire passes through the fixed block (62) and is connected with the sliding shaft block (64);
when the double-layer expandable unit is folded, the scroll spring (614) enables the hub (616) to rotate, and then the two sliding shaft blocks (64) are separated from each other through the second traction wire (617), and the redundant part of the inhaul cable (65) is accommodated in the groove of the rod body (10); when the double-layer deployable unit is deployed, the two sliding shaft blocks (64) approach to each other under the action of the inhaul cable (65), at the moment, the second traction wire (617) pulls the hub (616) to rotate reversely, and then the inhaul cable (65) is in a tensioned state through the elastic force of the volute spiral spring (614), so that the connection between the connecting rod (4) and the middle platform (3) is locked.
10. The double-deck deployable unit according to any one of claims 6 to 9, further comprising a holding block (66), wherein the holding block (66) is mounted in the middle of the guide shaft (63), grooves for the stay cables (65) to pass through are formed on both sides of the holding block (66), and the holding block (66) is used for preventing the guide shaft (63) from deforming.
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| CN202111543483.6A CN114104337B (en) | 2021-12-16 | 2021-12-16 | Double-layer expandable unit |
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| CN202111543483.6A CN114104337B (en) | 2021-12-16 | 2021-12-16 | Double-layer expandable unit |
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| CN114104337B (en) | 2023-08-25 |
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